i486
This page will show all objects that are named i486, and if possible sorted on production date.
Click on the blue name(s) or picture(s) below for detailed information, pictures and benchmarks (if available).
thandor.net - list object
Intel i486 DX33 'SX329'
Being made in the 15th week of 1991, this is an early 486DX33. In that time-frame the 386 at 25MHz or 33MHz was considered a modern PC. 286 was already low-end and the 486 was high-end. Note that the 486 logo is missing the DX suffix because there was no 486SX made yet. The first SX CPUs started app... > Read more
20MHz; one of the slowest 486 chips available (there are 16MHz parts as well). Thankfully it didn't sell well because it is quite a lot slower than the SX25. It's only a difference of 5MHz but remember that the front-side-bus (FSB) is also 5MHz slower. This will cause the impact to be bigger.... > Read more
Same as this SX 25 but with a different sSpec number and that it's more than two years older.... > Read more
A KU80486SX-25 (in QFP package) fitted on an UMC 4SLUD motherboard from 1992. ... > Read more
Exactly the same as the SX33 except for the integrated co-processor. This co-processor is used for floating point calculations. At the time normal applications didn't use the FPU (floating point unit) so people had enough power with only the, much cheaper, SX 33MHz processor. After all Doom ran just... > Read more
I bought this CPU in a package deal along with a few other CPU's. Amazingly enough this CPU has the same sSpec number and production date as my other sSpec SX419 DX33. What are the odds 
.... > Read more
A 1992 486DX-50; a good performer back in '92 but with high FSB which could be troublesome. The DX2/50 which runs at 25MHz FSB (clock-doubled) won't give you trouble but due the slower bus speed it will be slower with games or I/O.... > Read more
Both the Am486DX40 and Cx486DX40 were tricky on early motherboards because of their high bus speed. Think again and look at this 50MHz part that requires a 50MHz front side bus. 50MHz sounds like it will fly but unfortunately it doesn't.
My UMC PCI motherboard automatically sets the PCI bus on 25... > Read more
The same as the 80486SX2/50 but with floating point unit (FPU) on-board. The FPU is used for floating point calculations and comes in to play with CAD and Excel. Back then games didn't really use it yet so Doom will run pretty much the same on a SX2. Quake d... > Read more
A regular 486DX33. Although not many people used the 'DX' part (which indicates it has an on-board co-processor) a lot of people thought that the 'DX' was faster. They would've been right if it was a 386 because the SX/DX suffix has a different meaning with 386's. With 386 class processors SX means ... > Read more
A regular Intel 486DX2/50 that runs at 50MHz using a 25MHz FSB. It does it's job but if you could overclock this to 66MHz you could gain, in a VLB or PCI configuration, 25% more speed in Doom due to both the higher CPU clock and higher front-side-bus .
If memory serves me correctly this CPU was... > Read more
The DX2/66 was a popular processor in the 486 era. It has enough oomph to run Windows 3.1 and DOS-games from that era. For instance: Doom runs a lot smoother on a system with a DX2/66 fitted instead of a DX33, especially when you're running a Vesa Local BUS (VLB) graphics card.
This partic... > Read more
A 25MHz 80486 SX processor. Not very fast but it's not the slowest 486 ever made. This one runs 5MHz faster which is noticeably in applications. The SX25 could be overclocked to 33MHz quite often without any hassle. 8MHz may not sound much but will greatly improve the speed of the system. Especially... > Read more
An unusual processor. Most people either bought the SX33, DX33 or went for the DX2/66MHz. The DX2/66MHz usually gave the extra oomph compared to the 50MHz part and was worth the extra cash.
The SX2 doesn't have an integrated floating point unit (FPU) like any other 486SX CPU. Besides that it is e... > Read more
i486DX2/50 CPU in QFP package mounted on a Compaq CPU board for Compaq notebooks from 1994.... > Read more
The SX33 was quite a good processor for a while. Both AMD and Cyrix made 33MHz parts as well but DX/2, DX/4 and even DX/5 parts from these companies can be found more easily. This is because AMD and Cyrix had to make their own 486 because Intel didn't gave the 'howto make a 486-manual' to AMD and Cy... > Read more
Made in week 28 of 1994 which makes it a somewhat late 486 DX2/50. In that time-frame the Pentium 90 was Intel's flagship and running a DX/2 66MHz, DX/2 80 or even DX/4 100MHz made more sense in 1994. However, these 50MHz parts usually run fine at 66MHz and this particular example even booted up at ... > Read more
This is not the first 66MHz CPU in my database. In fact it's the third Intel 486DX2/66. The other two have a different sSpec number and one of them is faster than usual because it has write-back cache.... > Read more
The first 100MHz ticking part Intel brought onto the x86 market. The DX4/100 was actually a DX3/100 as it didn't clock quadruple but clock triple the front side bus frequency.
In many cases an old 486 couldn't be upgraded to the DX4/100. Not only because some motherboards didn't understand the cl... > Read more
Unlike this 486DX2/66 it has no build on heatsink. This allowed people to stick their own heatsink/fan solution onto it as the 486DX2/66 didn't run happy without heatsink.
This version of the DX2/66 is the fastest Intel ever made. See the benchmarks where... > Read more
A late DX2/66 (40th week of 1996). In late '96 486 at 100, 120 or 133MHz were considered low-end and Pentium's at 100 or 133MHz were commonplace with 166MHz being the top model.
An interesting twitch of this CPU is the indication of the model number. Every 486 has an indication of it's type and s... > Read more
List of objects with the same chipset
Vendor
Name
Trans.
vCore
Date
Socket
sSpec
Intel
1.2M
5V
9121
PGA168
SX406
Intel
0.9M
5V
9416
PGA168
SX798
Intel
0.9M
5V
9238
PQFP196
SX673
Intel
0.9M
5V
9151
PGA168
SX411
Intel
0.9M
5V
0025
PGA168
SX931
Cyrix
0.600
5V
9248
PGA132
N/A
UMC
?
5v
9509
PQFP196
?
Intel
0.9M
5V
9349
PGA168
SX789
Intel
1.2M
5V
9244
PGA168
SX419
Intel
1.2M
5V
9310
PGA168
SX729
Intel
1.2M
5V
9115
PGA168
SX329
Intel
0.9M
5V
9412
PGA168
SX797
UMC
?
5v
9431
PGA168
?
Cyrix
0.600
5V
9241
PGA132
N/A
Intel
0.9M
5V
9427
PGA168
SX902
Intel
1.2M
5V
9244
PGA168
SX419
Cyrix
0.600
5V
9430
PGA132
N/A
AMD
1.2M?
5V
9403
PGA168
24361
Evergreen
?
?
9337
PGA68
?
Texas Instruments
1.1M
5V
0000
PGA132
N/A
Cyrix
1.2M
5V
9407
PGA168
N/A
AMD
1.2M
5V
9340
PGA168
24361
Texas Instruments
0.600
5V
9423
PGA132
N/A
Texas Instruments
0.600
5V
9414
PGA132
N/A
AMD
1.2M
5V
9419
PGA168
24361
Intel
1.2M
5V
9418
PQFP196
SX825
Intel
1.2M
5V
9314
PGA168
SX641
Intel
1.2M
5V
9246
PGA168
SX546
Intel
1.2M
5V
9301
PGA168
SZ800
Intel
1.2M
5V
9428
PGA168
SX808
Texas Instruments
1.1M
5V
0000
PGA132
N/A
Intel
1.2M
5V
9251
PGA168
SX641
Intel
0.9M?
5V
9416
PGA168
SX845
Cyrix
1.2M
3,45V
9429
PGA168
N/A
Intel
1.2M
5V
9452
PGA168
SZ932
Intel
1.2M
5V
9250
PGA168
SX710
AMD
1.2M
5V
9522
PGA168
25220
Intel
1.2M
5V
9503
PGA168
SX955
AMD
1.2M
5V
9538
PGA168
25398
Intel
1.2M
5V
9640
PGA168
SX911
AMD
1.2M
5V
9414
PGA168
24361
AMD
1.2M
5V
9411
PGA168
24361
AMD
1.2M
5V
9505
PGA168
25220
AMD
1.2M
5V
9451
PGA168
25220
Texas Instruments
?
3.45V
0000
PGA168
N/A
Intel
1.2M
5V
9445
PGA168
SZ935
Intel
1.2M
5V
9451
PGA168
SZ935
IBM
1.2M
5V
0000
PGA168
N/A
AMD
1.2M
5V
9436
PGA168
24361
Intel
1.2M
5V
9447
PGA168
SX807
Texas Instruments
?
3.45V
0000
PGA168
N/A
Cyrix
1.2M
3,45V
9516
PGA168
N/A
Intel
1.2M
5V
9314
PGA168
SX731
Cyrix
0.600
5V
9438
PGA132
N/A
Intel
1.2M
3V
9425
PGA168
SX884
Intel
1.2M
5V
9602
PGA168
SZ956
Intel
1.2M
5V
9633
PGA168
SZ956
SGS Thomson
1.2M
5V
9644
PGA168
N/A
Texas Instruments
?
3.45V
0000
PGA168
N/A
AMD
1.2M
3V
9513
PGA168
25253
IBM
1.2M
5V
0000
PGA168
N/A
Cyrix
1.2M
5V
9532
PGA168
N/A
Cyrix
1.2M
5V
9533
PGA168
N/A
AMD
1.2M
3V
9512
PGA168
25253
Cyrix
1.2M
5V
9532
PGA168
N/A
AMD
1.2M
3V
9538
PGA168
25253
AMD
1.2M
3V
9503
PGA168
25253
AMD
1.2M
3V
9545
PGA168
25398
Intel
1.6M
3V
9501
PGA168
SX900
Texas Instruments
?
?
0000
PGA168
N/A
AMD
?
3,45v
0118
PGA168
?
Intel
1.6M
3V
9516
PGA168
SK051
Cyrix
1.2M
3.45V
9531
PGA168
N/A
Intel
1.2M
5V
9508
PGA168
SZ959
AMD
1.2M
3V
9644
PGA168
25372
AMD
1.2M
3V
9517
PGA168
25253
Intel
1.2M
5V
9709
PGA168
SZ957
AMD
1.2M
3V
9539
PGA168
25398
AMD
1.6M
3,45V
9605
PGA168
?
AMD
1.6M
3,45V
9601
PGA168
25544
Evergreen
1.6M
3,3V
9634
PGA168
?
AMD
1.6M
3,45V
9627
PGA168
25544
AMD
1.6M
3,45V
9715
PGA168
25544